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/* -*- Mode: C; c-basic-offset: 4 -*-
* pygtk- Python bindings for the GTK toolkit.
* Copyright (C) 1998-2003 James Henstridge
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "pygi-util.h"
gboolean
pygi_guint_from_pyssize (Py_ssize_t pyval, guint *result)
{
if (pyval < 0) {
PyErr_SetString (PyExc_ValueError, "< 0");
return FALSE;
} else if (G_MAXUINT < PY_SSIZE_T_MAX && pyval > (Py_ssize_t)G_MAXUINT) {
PyErr_SetString (PyExc_ValueError, "too large");
return FALSE;
}
*result = (guint)pyval;
return TRUE;
}
PyObject *
pyg_ptr_richcompare (void *a, void *b, int op)
{
PyObject *res;
switch (op) {
case Py_EQ:
res = (a == b) ? Py_True : Py_False;
break;
case Py_NE:
res = (a != b) ? Py_True : Py_False;
break;
case Py_LT:
res = (a < b) ? Py_True : Py_False;
break;
case Py_LE:
res = (a <= b) ? Py_True : Py_False;
break;
case Py_GT:
res = (a > b) ? Py_True : Py_False;
break;
case Py_GE:
res = (a >= b) ? Py_True : Py_False;
break;
default:
g_assert_not_reached ();
}
return Py_NewRef (res);
}
/**
* pyg_constant_strip_prefix:
* @name: the constant name.
* @strip_prefix: the prefix to strip.
*
* Advances the pointer @name by strlen(@strip_prefix) characters. If
* the resulting name does not start with a letter or underscore, the
* @name pointer will be rewound. This is to ensure that the
* resulting name is a valid identifier. Hence the returned string is
* a pointer into the string @name.
*
* Returns: the stripped constant name.
*/
const gchar *
pyg_constant_strip_prefix (const gchar *name, const gchar *strip_prefix)
{
size_t prefix_len, i;
prefix_len = strlen (strip_prefix);
/* Check so name starts with strip_prefix, if it doesn't:
* return the rest of the part which doesn't match
*/
for (i = 0; i < prefix_len; i++) {
if (name[i] != strip_prefix[i] && name[i] != '_') {
return &name[i];
}
}
/* strip off prefix from value name, while keeping it a valid
* identifier */
for (i = prefix_len + 1; i > 0; i--) {
if (g_ascii_isalpha (name[i - 1]) || name[i - 1] == '_') {
return &name[i - 1];
}
}
return name;
}
PyObject *
pyg_is_python_keyword (const gchar *name)
{
static PyObject *iskeyword = NULL;
PyObject *pyname, *result;
if (!iskeyword) {
PyObject *keyword_module = PyImport_ImportModule ("keyword");
if (!keyword_module) return NULL;
iskeyword = PyObject_GetAttrString (keyword_module, "iskeyword");
Py_DECREF (keyword_module);
if (!iskeyword) return NULL;
}
/* Python 3.x; note that we explicitly keep "print"; it is not a keyword
* any more, but we do not want to break API between Python versions */
if (strcmp (name, "print") == 0) Py_RETURN_TRUE;
pyname = PyUnicode_FromString (name);
if (!pyname) return NULL;
result = PyObject_CallOneArg (iskeyword, pyname);
Py_DECREF (pyname);
return result;
}
/**
* pyg_destroy_notify:
* @user_data: a PyObject pointer.
*
* A function that can be used as a GDestroyNotify callback that will
* call Py_DECREF on the data.
*/
void
pyg_destroy_notify (gpointer user_data)
{
PyObject *obj = (PyObject *)user_data;
PyGILState_STATE state;
state = PyGILState_Ensure ();
Py_DECREF (obj);
PyGILState_Release (state);
}
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